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HEIC to WebP Converter — Free, Local, No Upload

The short answer: Convert a still HEIC photo to WebP locally when the destination accepts WebP. Choose a quality setting and compare the downloaded image and actual bytes with the source. A smaller file or acceptance by an editor, CMS or upload form is not guaranteed.

How to convert HEIC to WebP

Convert HEIC to WebP now

The button opens the Image Format Converter with HEIC → WebP preselected — it runs entirely in your browser and nothing is uploaded.

Open Image Format Converter

Local in your browser — nothing is uploaded

  1. Open the converter

    The button above opens the Image Format Converter with the WebP output already selected.

  2. Drop your HEIC file

    Add the file (up to 25.0 MiB); the format is verified from its signature, not its name.

  3. Download the result

    Save the converted file and compare the exact before-and-after byte sizes.

Conversion facts

Input format
HEIC
Output format
WebP
Max file size
25.0 MiB
Verified max input
A headless-browser test on 2026-09-20 converted a 12.0 MiB file end to end; the first byte over the limit fails with a clear error. Benchmark methodology
Max dimensions
Up to 8192 px per side · 24 MP
Quality
Lossy — quality 50–95%
Processing
Local in your browser — nothing is uploaded

HEIC

HEIC → WebP

What to watch

The encode is lossy across a 50–95% quality range; start high because the HEVC source is already efficient and aggressive WebP quality will show it. Transparency survives into WebP, but HEIC metadata, depth data, and burst frames beyond the primary image are dropped — the workspace discloses the primary-image rule. WebP output requires browser encode support, verified before the option is offered, and files up to 25 MiB are accepted.

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Frequently asked questions

How does this tool decode HEIC without uploading it?
Your browser downloads a small local decoding engine (~3.3 MB, built on the open-source libheif library) the first time you drop a HEIC file, then keeps it cached on your device. The actual HEVC decoding runs in a dedicated worker on your machine — the photo never leaves your device, and repeat conversions skip the download entirely.
Does WebP keep transparency?
Yes. The alpha channel survives this conversion, so logos, icons, and cut-out images stay transparent in the WebP file.